# Relationship history for MSHA mine 0405368

Current hierarchy: **Robert C  McLaughlin; Michael J  McLaughlin → Eureka Ready Mix Concrete Co Inc → ERM Rock**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Robert C  McLaughlin et al → ERM Rock; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Maxxam Inc → ERM Rock; 1995-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** The Pacific Lumber Company → ERM Rock; 1999-07-01 to 2008-08-18; source msha-controller-operator-history
- **controller_controls_operator:** Maxxam Inc → The Pacific Lumber Company; 1999-07-01 to 2008-08-18; source msha-controller-operator-history
- **controller_controls_mine:** Alexander Redwood Partners, LLC et al → ERM Rock; 2008-08-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Humboldt Redwood Company LLC → ERM Rock; 2008-08-19 to 2008-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Alexander Redwood Partners, LLC et al → Humboldt Redwood Company LLC; 2008-08-19 to 2008-09-01; source msha-controller-operator-history
- **operator_operates_mine:** Eureka Ready Mix Concrete Co Inc → ERM Rock; 2008-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  McLaughlin et al → Eureka Ready Mix Concrete Co Inc; 2008-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  McLaughlin et al → Eureka Ready Mix Concrete Co Inc; 2008-09-02 to current/open; source msha-controller-operator-history